HELP, i dont know how to write code for this

Write a Matlab function that will accept variable number of arguments. If it receives no argument, it will return 'Hello'. If it receives one scalar argument, it will return a structure having one field named 'first' with the value of that scalar argument. If it receives one array, it will return the first column of that array. If it receives two arrays of correct size (same inner dimensions) it will return the product (matrix multiplication) of these arrays, otherwise it returns the product of the top right element of the first array and the bottom right element of the second array. If more than two arguments are received it will return 'unknown case'.

[KSSV]

Home work.....what have you attempted?

[Cooper Jones]

i dont know where to start

Answer 1

[DGM]

Use varargin, isscalar, ismatrix, etc. This should get you started.

function out = supercoolfunction(varargin)

switch numel(varargin)
    case 0
        out = 'Why Hello There';
    case 1
        thisarg = varargin{1};
        if isscalar(thisarg)
            % assign something to out
        elseif ismatrix(thisarg)
            % assign something to out
        end
    case 2
        thisarg = varargin{1};
        thatarg = varargin{2};
        % do something similar here
    otherwise
        out = 'whatever it''s supposed to say here';
end

Technically, ismatrix() only works on 2D arrays, but I don't think that really matters for this assignment.

[Cooper Jones]

Thankyou